Ophthalmic mounting



July 28, 1936. BAKER 2,049,102

OPHTHALMI C MOUNT ING Filed May 15, 1935 INVENTOR N8)60i'l M. B aKerATTO EY Patented July 28, 1936 PATENT oi-rice 2,049,102 OPHTHALMICMOUNTING Nelson M. Baker,.Southbridge, Mass, assignor to AmericanOptical Company, Southbridge, Mass, a voluntary association ofMassachusetts Application May 15, 1935, Serial No. 21,501

2 Claims.

This invention relates to ophthalmic mountings and particularly togoggles or eye protectors and has particular reference to improved meansfor ventilating the same.

One of the principal objects of the invention is to provide improvedmeans for providing additional ventilation for usual types.

Another object of the invention is to provide means whereby theventilation may be increased or decreased quickly and easily.

Other objects and advantages of the invention will become apparent fromthe following description taken in connection with the accompanyingdrawing and it will be apparent that many changes may be made in thedetails of construction and arrangement of parts without departing fromthe spirit of the invention as expressed in the accompanying claims. I,therefore, do not wish to be limited to the exact details ofconstruction and arrangements shown and described as the preferred formsonly have been shown by way of illustration.

Referring to the drawing:

Fig. I is a front view of a pair of goggles embodying the invention;

Fig. II is a cross section on line II-II of Fig. I;

Fig. III is a perspective view of one of the eyecups of the goggleshowing the parts unassembled; and

Fig. IV is a cross section similar to Fig. II but showing the goggleadapted for ordinary purposes.

In the prior art Where devices of this kind were worn by those workingin confined areas it Was found that the usual types would not providesuflicient ventilation in the interior of the eyecups and the lenseswould become steamed or fogged which was dangerous as well as annoyingto the user. One of the principal objects of the invention is toovercome these difliculties.

Referring more particularly to the drawing wherein like referencecharacters designate like parts throughout, the goggles shown embodyingthe invention comprises a pair of eyecups I each having an edge portion2 adapted to fit against the face of the wearer and be held thereagainstby the headband 3 which is connected to the eyecups l by means of theclip members 4. Adjacent their outer ends I, the eyecups are providedwith the threaded portions 5.

When the goggles are to be used for ordinary purposes, as shown in Fig.IV, a lens such as B is placed on the ends I of the eyecups and heldthereon by cap members H which have threaded portions to engage thethreaded portions 5 and flanges l2 to retain the lens 6 on the seat Iwhen the threaded members are engaged.

When the goggles are to be worn in confined areas, a split perforatedannular member 8 with the flanges 9 and I is positioned so that one ofits flanges 9 rests on the seat 1. On the other flange I0 is positionedthe lens 6. An annular cap member I I having the ventilation openings I1is then placed over the lens 6 and perforated member 8. This cap memberII has a flange 10 [2 adjacent its forward end I3 and a threaded portionI4 adjacent its opposite end l5 when the threaded portion M of the capII is threaded onto the threaded portion 5 on the eyecup l, the flangel2 engages the lens 6 and retains the parts in assembled position.

It will be noted that additional ventilation is provided throughperforations 16 in the perforated member 8 and through the openings I!in the cap member I I. The goggles may be worn 20 by workers in confinedareas without the danger and annoyance of the lenses becoming steamed orfogged and also that as the goggles may be quickly and easily adaptedfor either purpose it is not necessary to keep a double stock as thesame goggle may be quickly and easily adapted for either purpose.

From the above it will be seen that I have provided means wherebygoggles of the usual type may be easily, efilciently and economicallyadapted for use in confined areas.

Having described myinvention, I claim:

1. In a device of the character described, an eyecup having a seatadapted to be engaged by a transparent screen, screw threaded meansadjacent said seat, a perforated cylindrical spacer member havinginwardly extending flanges, one of said flanges adapted to form a seatto engage the seat on said eyecup, the other of said flanges adapted toform a seat to be engaged by-said transparent screen, a perforated capmember having an inwardly extending flange adjacent one end and screwthreaded means adjacent the other end thereof adapted to engage thescrew threaded means on said eyecup, said cap member adapted to fit oversaid spacer member and adapted to engage said transparent screen withsaid flange engaging said transparent screen when said screw threadedmeans on said cap member engages the screw threaded means on saideyecup, the perforations in said cap member being large in the directionof the periphery thereof and the perforations in said spaced being verysmall as compared to the perforations in said cap member to prevent theentrance of foreign particles while permitting substantially free andeven cross ventilation throughout the periphery of said eyecup.

2. In a device of the character described for use with an eyecup havinga seat adjacent one end thereof normally adapted to support a lens andconnecting means adjacent said seat, a cylindrical spacer member havinga plurality of relatively small adjacent openings throughout its sideWalls and having an end adapted to engage the seat on the eyecup and anend adapted to form a seat to be engaged by the lens, a perforated caplike member having an inwardly exto permit free ventilation and yet aidin preventtending flange adjacent one end andconnecting means adjacentits oppositeend adapted to en on the eyecup, said cap like memberbeingadap'ted to fit over the spacer member when in position on the eyecupand adapted to engage the lens with its flanged portion engaging saidlens when the connecting means are in cooperative relation with eachother, the perforations in said cap like member being relatively largeas compared to the openings in the spacer member and being adapted toembrace a plurality of said openings in said spacer member to permit"substantially free and even cross ventilation beneath the lensthroughout the periphery of the eyecup, the openings in the spacermember being so formed, as

ing' the entrance of foreign particles into said eyecup during use.

" NELSON M. BAKER.

